Question

answer the following question​

Answer 1

$\huge\purple{Required \: Answer :}$

Radius = 5 cm

Area = 78.5 cm

$\huge\bf{Explanation :}$

Given :

• Circumference = 31.4 cm

To Solve :

• Radius = ?
• Area = ?

Formula :

• Circumference = 2πr
• Area = πr^2

Solution :

$Circumference = 2\pi r \\ 31.4 \: cm \: = 2\pi r \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \: \: \: \: \: \: \: \: \: \: \: \: r = \frac{31.4}{2 \times 3.14} \: cm \\ r = \frac{10}{2} \: cm \\ r = 5 \: cm \: \: \:$

$Area = \pi {r}^{2} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 3.14 \times 5 \times 5 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \ = 78.5 \: {cm}^{2}$

$\huge\sf\implies{Thanks : ❤}$

Answer 2

Step-by-step explanation:

Answer :

=> Radius :- 5 cm

=> Area :- 78.5 cm

Given :

• Circumference :- 31.4 cm

To find :

• Area :
• Radius :

Solution :

Formula for this :-

$</em><em> </em><em>C</em><em>ircumference</em><em>:</em><em>-</em><em> </em><em>2</em><em>π</em><em>r</em><em> \:$

$</em><em>A</em><em>rea</em><em> </em><em>:</em><em>-</em><em> </em><em>πr</em><em>²</em><em>$

→ Circumference :- 2πr

$r = \frac{31.4}{2×3.14}$cm

$r = \frac{10}{2} cm$

$r = 5cm$

• Radius :- 5 cm

|→ Area :- πr²

$3.14 \times 5 \times 5$

$= 78.5cm$

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